From the main beach, you can snorkel over the seagrass bed. Waterlemon Cay is a separate offshore destination reached by swimming along the eastern shore. Rocks and long-spined sea urchins make the water entry tricky; look for sand underfoot. If you swim around the Cay, stay on its southern side, since the current can run strongly on the north side facing Tortola.
The best shore view is the curve of pale sand against blue-green water and the wooded hillside across the bay. Include some of that curve in a photo so the small shoreline reads clearly.